author(s)
NA Bhatt, YM Rojasara and JN Patel

abstract
The experiment was carried out in tobacco based agro-ecosystem. The entomophage biodiversity park along with two separate plots of tobacco near and away were raised at Bidi Tobacco Research Station, Anand Agricultural University, Anand during the year 2018. Tobacco being long duration crop passes through biotic and abiotic stresses. Among these biotic stress insect pest causes economic losses both quantitatively and qualitatively. Chemical control of these pests has certain important limitations like pesticide residues. The activity of various natural enemies like spider, coccinellids, Nesidiocoris tenuis, Geocoris ochropeterus and Rhynocoris sp, were found on different crops raised under entomophage park. Out of various bio agents maximum activity of N. tenuis was found in tobacco. The population of coccinellids were build up in flowering crops like marigold, cotton, and maize. The population of spiders were present in all the crops raised under biodiversity perk. The abundance of natural enemies and insect pests on tobacco grown nearby entmophage biodiversity park and away from it revealed more or less similar trend throughout the crop season. Coccinellids had highly significant negative correlation with Bright sun shine hours (BSS), Wind speed (WS), Minimum temperature (Min T), Mean Temperature (Mean T), Relative humidity morning (RH₁), Relative humidity evening (RH₂), Mean relative humidity (Mean RH), Vapor pressure morning (VP₁), Vapor pressure evening (VP₂) and Mean vapor pressure (Mean VP)_. Among the predatory bugs, Geocoris ochropeterus showed significant negative correlation with Wind speed (WS), Relative humidity evening (RH₂) and Mean relative humidity (Mean RH)_, while Nesidiocoris tenuis established highly significant negative correlation with Bright sun shine hours (BSS), Minimum temperature (Min T), Mean Temperature (Mean T), Relative humidity morning (RH₁), Relative humidity morning (RH₂), Mean relative humidity (Mean RH), Vapour pressure morning (VP₁), Vapour pressure evening (VP₂) and Mean vapor pressure (Mean VP). Entomophage biodiversity park suggestively boosted the fecundity and survival of the natural enemies of the crop pest and such parks may play an imperative role in maintaining the biodiversity and augment natural enemies leading to natural pest control.